Chersodromia obscura Grootaert, Cumming & Shamshev, 2007

Grootaert, Patrick & Shamshev, Igor V., 2012, The fast-running flies (Diptera, Hybotidae, Tachydromiinae) of Singapore and adjacent regions, European Journal of Taxonomy 5, pp. 1-162 : 29

Chersodromia obscura Grootaert, Cumming & Shamshev, 2007

Figs 41-43

Chersodromia obscura Grootaert, Cumming & Shamshev, 2007: 59 .

Diagnosis

Pale yellow species belonging to the C. flavicaput group. Occiput dark yellowish in ground-colour. One pair of distinct vertical bristles. No acrostichals. Hind tibia with only 3 long bristles on apical half.

Distribution

Thailand.

Habitat and seasonal occurrence

River banks in bamboo forest, April.

Remarks

Chersodromia obscura differs from C. flavicaput in having only 3 long bristles on the hind tibia while the latter has 5 bristles. In addition C. obscura has a pair of distinct vertical bristles, no acrostichals, stronger male cerci, longer spines on left surstylus, and tip of phallus is less coiled.

Figures

Figs 41-43. Chersodromia obscura Grootaert, Cumming & Shamshev, 2007, ♂ terminalia. 41. right epandrial lamella, lateral view. 42. epandrium with cerci, dorsal view. 43. left epandrial lamella fused to hypandrium with detail of surstylus. lc = left cercus, ls = left surstylus, ph = phallus. Scale bar = 0.1 mm (after Grootaert et al. 2007).